How to compare the output of PCA analysis?

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Andrea
Andrea on 4 Jun 2014
Commented: Walter Roberson on 28 May 2020
Hello to everyone.
I have this problem: I run a PCA analysis using the princomp function on two 8x3 matrices. Then, in order to find out whether they behave similarly or not I would like to perform a comparison of such vectors.
I found two ways: the first was proposed by Krzanowski (1979) (see ikaros.teipir.gr/era/era2/fullpap/B26.doc on page 4), but the problem is that applying the equation 3 on page 4 I always, i.e. regardless of the input data, that the similarity factor (called Sim is always maximum, in my case 3: how can I use it then?) and the second by Yang and Shahabi (2004) that I still have to try.
What is your suggestion?
Thank you.

Answers (1)

James Cai
James Cai on 5 Apr 2018
  2 Comments
Walter Roberson
Walter Roberson on 28 May 2020
I disagree Jeremy Milne: it is a link to source code that implements the kind of similarity measure that the poster appears to have been asking for.

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